This is taking me closer to home :

I have a question, the company i work for sales cellphones and we receive these in batches of like 5000 per type of device. 

 

These phones have different serial numbers that we would like to use for tracking them in our inventory, my problem is when trying to upload a file from excel it rejects the other lines, with an error message that the product already exists.

 

Its the same product but just different identification numbers , how do i cross this bridge?

 

looking forward to your assistance